DuraFlex Flexible Chimney Relining System

DuraFlex SS (Stainless Steel)
is flexible relining for masonry chimney for use with gas, wood pellet, oil, or wood burning appliances, including: fireplace inserts, furnaces, boilers, and water heaters. Ensures safe and efficient venting of heating appliances, while protecting the masonry chimney from the damaging effects of flue product condensation. The 304 SS and 316Ti SS are designed for use with wood-burning, wood pellet, and non-condensing gas, coal, and oil appliances. Titanium is designed for harsher conditions, for more resistance to corrosion, such as coal.

DuraFlex Stainless Steel has a 0" clearance to masonry for gas. 1" clearance to masonry for pellet and oil applications. Insulation is required for 0" clearance to masonry.

DuraFlex Aluminum has a 0" clearance to masonry.

Be sure to select the proper liner for the application. DuraFlex Stainless Steel is used for appliances that use oil, wood, or wood-pellets for fuel; DuraFlex Aluminum is for a non-condensing gas appliance.

DuraFlex SS - OMNI Listed to UL 1777 and ULC S635 (43-P-02-2).

DuraFlex AL - UL Listed to UL 1777 (MH14420).

Typical Installations

Before relining a chimney, it should be cleaned and inspected to verify the integrity of the mortar and masonry. In addition, have a certified chimney professional determine if the masonry was constructed with 0"or 1" clearance to the surrounding combustibles. This is an important fire safety issue that may have an influence on how the liner is installed.

Be sure to select the proper liner for the application. DuraFlex SS is used for appliances that use oil, wood, or wood-pellets for fuel; DuraFlex AL is for a non-condensing gas appliance.

Refer to the appliance manufacturer for installation requirements affecting venting. Keep the vent path as straight as possible for best performance.

Installation Key

1

DuraFlex SS Cap

8

DuraFlex Mortar Sleeve

2

DuraFlex AL Cap

9

DuraFlex AL Coupling

3

DuraFlex Top Plate

10

DuraFlex SS Connector

4

DuraFlex SS Length

11

PelletVent Pro Appliance Adapter

5

DuraFlex AL Length

12

B Vent Pipe Collar

6

DuraFlex SS Tee

13

Rigid Type B Gas Vent

7

DuraFlex AL Tee

14

Rigid PelletVent Pro

The inner pipe diameter should match the outlet size of the appliance.